2. Marco Polo Bridge Incident (July 7, 1937 – July 9, 1937) (7 juill. 1937 – 9 juill. 1937)

Description:

After taking over Manchuria in 1931, Chinese and Japanese soldiers had been stationed at the border outside Beijing. Due to a misunderstanding, and an exchange of fire; Japanese soldiers were sent to further attack China. This could be considered the start of the Second Sino-Japanese War. (Cavendish)